Honing element retainer



A ril 21, 1970 M.. A. MAGSIG r 3,507,077

- I ELEMENT RETAINER HONING Filed Jan. 15, 1968 2 Sheets-Sheet 1 i 40 a4 If A INYENTOR A A/z) ,4. 4446676 ATVTORNEYS April 1970 M. 'A. MAGISIG3,507,077

ELEMENT RETAINER HONING Filed Jan. 15, 1968 2 Sheets-Sheet 2 FIG 5 l4 7Ml/Q llk INVENTOR A M/V1) A 2%465/6 ATTORNEYS United States Patent3,507,077 HONING ELEMENT RETAINER Manly A'. Magsig, Durand, Mich.,assignor to MWA Company, Owosso, Mich., a corporation of Delaware FiledJan. 15, 1968, Ser. No. 697,790 Int. Cl. B24b 9/02 U.S. Cl. 51338 8Claims ABSTRACT OF THE DISCLOSURE The honing assembly comprises a hollowhead or shell provided with a plurality of circumferentially spacedslots, honing elements projecting fromthe slots, and an adjusting memberfor the honing elements within the head. The honing elements are seatedin grooves in the adjusting member, and carrier blocks mounted on theadjusting member alongside the grooves support spring pressed ballswhich frictionally engage the honing elements to retain them in radiallyadjusted position.

BACKGROUND OF THE INVENTION This invention is an improvement on priorconstructions in which the honing elements are prevented from fallingout of the slots by having a tight fit in the slots.

SUMMARY OF THE INVENTION in radially adjusted position.

Another object is to provide a retainer for each of the honing elements,the retainer including a carrier block having a plurality ofspring-pressed balls urged into frictional contact with the side of thehoning element.

Another object is to provide an elongated groove or recess in the sideof each honing element to be engaged by the spring-pressed balls.

Other objects and features of the invention will become apparent as thefollowing description proceeds, especially when taken in conjunctionwith the accompanying drawings wherein:

FIGURE 1 is a side elevational view, with parts broken away and insection, showing a honing assembly constructed in accordance with myinvention.

FIGURE 2 is a side elevational view of a portion of the assembly shownin FIGURE 1.

, FIGURE 3 is a sectional view taken along the line 3--3 of FIGURE 1.

FIGURE 4 is an enlarged fragmentary sectional view taken along the line4-4 of FIGURE 1.

FIGURE 5 is an elevational view, with parts broken away and in section,of the adjusting member.

' FIGURE 6 is a sectional view taken along the line 6-6 of FIGURE 5.

FIGURE 7 is a front elevation of a honing element retainer.

' FIGURE 8 is a side elevational view of the honing element retainershown in FIGURE 7.

Referring now more particularly to the drawings, the honing assembly ortool is generally designated 10 and comprises an elongated tubular heador shell 12, a plurality of honing elements 14 and an adjusting member18.

3,507,077 Patented Apr. 21, 1970 The head 12 has a smooth cylindricalinner surface 20 for axially slidably supporting the adjusting member18. Near its lower end the head 12 has a plurality of elon gated,equally circumferentially spaced slots 16 which in the present instanceare shown as extending axially of the head. A honing element 14 projectsthrough each of the slots 16.

The honing elements 14 may be of any suitable construction and in thepresent instance are shown as comprising an elongated abrasive elementor stone 22 of rectangular cross section mounted in a holder 24. Theholder 24 may be of any suitable material such, for example, as metal orplastic. The front working face 26 of the stone 22 as well as one sideare exposed, but preferably the other side and both ends of the stoneare covered by the material of the holder. The rear surface or base 28of the holder is inclined longitudinally of the honing element asindicated in FIGURE 1.

The adjusting member 18' is in the form of a cylindrical body having aplurality of elongated circumferentially spaced axially extendinggrooves 30 in its outer surface. The grooves extend from near the upperend of the adjusting member to the lower end thereof and respectivelyregister with the slots 16in the head. The base 32 of each groove isinclined axially at the same angle as the base 28 of the honing elements14. The sides of each groove 30 are parallel to one another and to thelongitudinal axis of the adjusting member, to closely receive andconfine the opposite parallel sides of the honing elements.

The radially inner portions of the honing elements 14 are respectivelyreceived in the grooves 30 with the bases 28 of the honing elementsflush against the bases 32 of the grooves. It will "be obvious that adownward movement of the adjusting member 18 will result in radiallyoutward adjustment of the honing elements 14. Any suitable means may beprovided for axially raising and lowering the adjusting member 18relative to the head. As shown in FIG- URE 1, a rod 34 is connected tothe upper end of the adjusting member 18 and extends axially upwardthrough an opening 36 in the upper end of the head, having a coupling 38at its upper end adapted to be joined to a suitable device for raisingand lowering the adjusting member.

A honing element retainer 40 is provided for each honing element. Eachretainer 40 comprises an elongated carrier block 42 and a plurality ofspring-pressed balls 44. The carrier blocks are mounted in recesses 46'in the outer cylindrical surface of the adjusting member alongside eachof the grooves 30. The recesses 46 are of the same size and shape as theretainers, as will be clear from FIG- URES 5 and 7, and each has a sideopening through one side of the associated groove 30. The carrier blocks42 may be radially inwardly inserted into the recesses 46-, andremovably secured in position by fasteners 48.

The balls 44 are supported by the carrier blocks 42 in bores 50. Thebores 50 extend transversely through the carrier block as shown inFIGURE 4, being open at both ends and, when the carrier blocks aremounted on the adjusting member, such bores extend chordwise thereof.The ends of the bores 50 which open into the grooves 30 are swaged overas indicated at 52 to provide a reduced opening of smaller diameter thanthe balls so that the balls cannot drop out when not in engagement witha honing element. The opposite ends of the bores are closed by the side54 of the recess 46. Compression coil springs 55 in the bores bearagainst the side 54 of the recesses and constantly urge the balls 44 ina direction toward the grooves 30 so as to project partially into thegrooves as shown in FIGURES 4.

The honing elements 14 preferably have an elongated groove or recess 58in the side facing the retaining devices 3 40, into which the balls 44are adapted to extend. As shown in FIGURE 1, the balls 44 of eachretainer are arranged in a line at an inclination corresponding to andregistering with the groove 58 in the associated'honing element. Thegrooves 58 are parallel to the rear surfaces 28 of the honing elements.

In use, one or more balls 44 of each retaining device frictionallyengage the groove or recess 58 of the associated honing element tofrictionally retain it in radially adjusted position. The balls 44 mayactually press the honing elements toward and into frictional contactwith the opposite sides of the slots 30. Hence, the honing elements willnot fly out of their slots by centrifugal force during rotation of thehead after the head has been withdrawn from a cylindrical bore beinghoned. The balls 44 will frictionally retain the honing elements againstthe action of such centrifugal force.

When it is desired to adjust the honing elements radially outwardly, theadjusting member 18 is lowered'camming the honing elements in an outwarddirection and causing the balls 44 to move downward in the grooves 58 ofthe honing elements. However, the balls continue to engage the grooves58 and frictionally retain the honing elements in adjusted position. Theengagement of the balls 44 in the grooves 58 will also pull the honingelements in a radially inward direction when the adjusting member israised.

While it is preferred that the honing elements have grooves 58 forengagement by the balls 44, in a broader sense these grooves may beomitted and instead the balls may engage the fiat side face of thehoning elements to frictionally retain them in adjusted position.

In prior constructions, the honing elements have been held in the slotsby having a tight fit in the slots. However, this resulted in slot wearto the point that the honing elements were no longer held by frictioncontact with the slot walls. Thus it became necessary to frequentlyreplace the head. Moreover, reliance upon a tight fit in the slots madeit difficult to install the honing elements in the slots withoutdamaging the honing elements. A further disadvantage was inherent inthis prior construction in that it afforded no means for retracting thehoning elements.

In accordance with the construction herein described, the slots 16 arenot subjected to wear since they may be slightly larger than the honingelement because the honing elements are held in adjusted position by theretainers 40. Thus slot wear is no problem and the honing head lastslonger. Moreover, there is no problem connected with the insertion ofthe honing elements into the honing head through the slots. During thisradially inward movement of the honing elements, the balls 34 are cammedback and then snapped into the grooves 58 in the sides of the honingelements. In addition, when the adjusting member 18 is raised, the ballscause the honing elements to be retracted radially inwardly. Hence theretracted honing elements will not bump the workpiece when the head isinserted in a bore to be honed.

What I claim as my invention is:

1. A honing assembly comprising a hollow head provided with a pluralityof circumferentially spaced slots, honing elements adapted to projectfrom said slots, an adjusting member for said honing elements supportedwithin said head, and means carried by said adjusting member forresisting radial movement of said honing elements from adjustedposition, said means including a plurality of balls, and a spring urgingeach ball laterally into contact with one side of a honing element.

2. The honing assembly defined in claim 1, wherein each honing elementhas a recess receiving a ball.

3. A honing assembly comprising a hollow head provided with a pluralityof circumferentially spaced slots, honing elements adapted to projectfrom said slots, an

I ciated honing element.

adjusting member for said honing elements supported Within said head,and means on said adjusting member for resisting radial movement of saidhoning elements from ad usted position, said means including a surfaceof said adjusting member supporting a side of each honing element, aplurality of balls, and a spring urging each of said balls into contactwith the other side of each of said respective honing elements, wherebyto press the firstmentioned sides of said honing elements into frictioncontact with said surfaces of said adjusting member.

4. A honing assembly comprising a hollow head provided with a pluralityof circumferentially spaced slots, honing elements adapted to projectfrom said slots, an adjusting member for said honing elements supportedfor axial movement within said head, said adjusting member having aplurality of circumferentially spaced axially extending groovesrespectively registering and receiving said honing elements, the basesof said grooves being tapered so as to move said honing elementsradially outward in response to axial movement of said adjusting member.in one direction, and means carried by said adjusting member adjacenteach groove for resisting radial movement of the honing element in thelatter groove from adjusted position, said means adjacent each grooveincluding a ball, and a spring urging each ball laterally into contactwith the associated honing element.

5. A honing assembly comprising a hollow head provided with a pluralityof circumferentially spaced slots, honing elements adapted to projectfrom said slots, an adjusting member for said honing elements supportedfor axial movement withinsaid head, said adjusting member having aplurality of circumferentially spaced axially extending groovesrespectively registering with said slots and receiving said ho'ningelements, the bases of said grooves being tapered so as to move saidhoning elements radially outward in response to axial movement of saidadjusting member in one direction, and means carried by said adjustingmember adjacent each groove for resisting radial movement of the honingelement in the latter groove from adjusted position, said means adjacenteach groove including a carrier removably mounted on said adjustingmember in a side wall of said groove and having a plurality oftransverse bores opening into said groove, balls respectively slidablydisposed in said bores, and springs in said bores urging said ballstransversely so as to project from said bores and have contact with theasso- 6. The honing assembly defined in claim 5, wherein said ballspress said honing elements into friction contact with the side walls ofsaid grooves opposite the first-mentioned side walls thereof.

7. The honing assembly defined in claim 5, wherein each honing elementhas an elongated groove parallel to the base of the groove in saidadjusting member in which it is received, said balls engaging in saidlast-mentioned grooves.

8. The honing element defined in claim 5, wherein means are provided forpositively preventing said balls from dropping out of said bores throughthe open ends thereof.

References Cited UNITED STATES PATENTS 1,601,813 10/1926 Emerson 51-3423,037,333 6/ 1962 Stelmaehowski 51-346. 3,084,487 4/1963 Engle 51-3313,109,266 11/1963 Engle 51-346. 3,138,902 6/1964 Crowe 51-346 3,403,48110/ 1968 McDonald 5 l204 OTHELL M. SIMPSON, Primary Examiner with saidslots.

Po-ww UNITED STATES PATENT OFFICE 569 CERTIFICATE OF CORRECTION PatentNo. 3,507,077 Dated April 21 1970 Inventor) MANLY A. MAGSIG It iscertified that error appears in the above-identified patent and thatsaid Letters Patent are hereby corrected as shown below:

Column 4, Claim 8 line I, for "5" read 6 SIGNED AND SEALED AUG 1 1.197

SEAL) Am mm I- BGBUHI! JR- Edwml dominion 0t Pa an Attesting 0M

